<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>2007-4026</journal-id>
<journal-title><![CDATA[Ingeniería agrícola y biosistemas]]></journal-title>
<abbrev-journal-title><![CDATA[Ing. agric. biosist.]]></abbrev-journal-title>
<issn>2007-4026</issn>
<publisher>
<publisher-name><![CDATA[Universidad Autónoma Chapingo]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-40262017000100037</article-id>
<article-id pub-id-type="doi">10.5154/r.inagbi.2017.04.009</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Estimation of leaf area index and yield of greenhouse-grown poblano pepper]]></article-title>
<article-title xml:lang="es"><![CDATA[Estimación de índice de área foliar y rendimiento de chile poblano cultivado en invernadero]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mendoza-Pérez]]></surname>
<given-names><![CDATA[Cándido]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramírez-Ayala]]></surname>
<given-names><![CDATA[Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ojeda-Bustamante]]></surname>
<given-names><![CDATA[Waldo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Flores-Magdaleno]]></surname>
<given-names><![CDATA[Héctor]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Colegio de Postgraduados  ]]></institution>
<addr-line><![CDATA[Montecillo México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Mexicano de Tecnología del Agua  ]]></institution>
<addr-line><![CDATA[Jiutepec Morelos]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2017</year>
</pub-date>
<volume>9</volume>
<numero>1</numero>
<fpage>37</fpage>
<lpage>50</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-40262017000100037&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-40262017000100037&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-40262017000100037&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Leaf area index (LAI) is a useful variable to characterize crop dynamics, productivity and water requirements. The three-fold aim of this work was to estimate the LAI of poplano pepper (Capsicum annuum L.) with a ceptometer, compare the results with the destructive method and analyze the relationship between the LAI and crop yield. The experiment was carried out in a greenhouse at the Colegio de Postgraduados, Montecillo campus. The transplant date was April 21 and the harvest ended on November 11, 2014. Tezontle was used as substrate and drip irrigation was applied. The experiment consisted of three treatments (T): T1 (two stems), T2 (three stems) and T3 (without pruning). To estimate the LAI, a ceptometer was used to measure the radiation intercepted above and below the canopy. Leaf area was measured with the LI-3100C area meter. Results indicated that the maximum LAI occurred at flowering, corresponding to 2,096 growing degree days (GDD) with 0.93, 1.2 and 2.75 for T1, T2 and T3. Estimating LAI with a ceptometer proved to be a suitable and reliable method, since the linear correlation coefficient (R2) obtained between the two methods was 0.82, 0.94 and 0.99, for T1, T2 and T3, respectively. The yield obtained was 10.74, 8.28 and 5.49 kg·m-2 for T3, T2 and T1, respectively. Increasing the number of stems per plant increased LAI, yield and number of fruits; however, fruit size decreased.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El índice de área foliar (IAF) es una variable útil para caracterizar la dinámica, productividad y requerimientos hídricos de cultivos. El objetivo de este trabajo fue estimar el IAF de chile poblano (Capsicum annuum L.) con un interceptómetro y comparar los resultados con el método destructivo; además, analizar la relación que existe entre el IAF y el rendimiento del cultivo. El experimento se realizó en un invernadero del Colegio de Postgraduados, campus Montecillo. La fecha de trasplante fue el 21 de abril y finalizó la cosecha el 11 de noviembre de 2014, para lo cual se empleó tezontle como sustrato y riego por goteo. El experimento consistió en tres tratamientos (T): T1 (dos tallos), T2 (tres tallos) y T3 (sin poda). Para estimar el IAF se utilizó un interceptómetro; el cual mide la radiación interceptada por encima y por debajo del dosel. Se midió el área foliar con el integrador LI-3100C. Los resultados indicaron que el máximo IAF se presentó en floración, que corresponde a los 2,096 grados día desarrollo (ºDD) con 0.93, 1.2 y 2.75 para T1, T2 y T3. La estimación del IAF con el interceptómetro mostró ser un método adecuado y confiable, ya que el coeficiente de correlación lineal (R2) obtenido entre ambos métodos fue de 0.82, 0.94 y 0.99, para T1, T2 y T3, respectivamente. Por su parte, el rendimiento obtenido fue de 10.74, 8.28 y 5.49 kg·m-2 para T3, T2 y T1, respectivamente. Al aumentar el número de tallos por planta incrementó el IAF, el rendimiento y número de frutos; sin embargo, el tamaño de frutos disminuyó.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[ceptometer]]></kwd>
<kwd lng="en"><![CDATA[leaf area meter]]></kwd>
<kwd lng="en"><![CDATA[photosynthetically active radiation]]></kwd>
<kwd lng="en"><![CDATA[Capsicum annuum L]]></kwd>
<kwd lng="es"><![CDATA[interceptómetro]]></kwd>
<kwd lng="es"><![CDATA[integrador de área foliar]]></kwd>
<kwd lng="es"><![CDATA[radiación fotosintéticamente activa]]></kwd>
<kwd lng="es"><![CDATA[Capsicum annuum L]]></kwd>
</kwd-group>
</article-meta>
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